Internal-cumbustion engine.



' 0. M. LEECH.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED MAR. I2, I914. RENEWED APR- 3, I9I6.

Ia-tented I-Ia g, 1916.

MZAM.

Charla M. leech,

Iii-{101,019,1

1 U ITED s'rarns PATENT ornion.

CHARLES M. LEECII, F LIMA, OHIO.

INTERNAL-COMBUSTION Enema.

Specification of Letters Patent,

ate ted May 9; 1916.

Application filed March 12, 1914, Serial No. 824,164. Renewed April 3, 1916. Serial No. 88,703.

To all whom it may concern .fi

Be it known that I, CHARLES M. Lnrzcn a citizen of the United States, residing at Lima, in the county of Allen and State of Ohio, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is-a specification.

My invention relates to improvements in internal combustion engines of the two cycle or four cycle type having means to heat and compress the charge of gas prior to its introduction into the explosion cylinder.

An important object or". the invention is toprovide means for utilizing the exhaust or products of combustion passing from the .explosion cylinder, to heat the incoming charge passing through the movable or rotatable distributing valve, prior to its introduction into the pumping chamber. to be supplied thereby to the explosion cylinder...

A further object of the invention is to pro videanovel form of charge or gas pumping or compression means, dispensing with crank case compression. and at the same time simplifying the construction of the engine.

A further object of the invention is to provide means for introducing aii's eparate supply of fresh air into. the pumping cylinder. to properly dilute the previously mixed gas or charge supplied thereto from the'can bureter, such introduction of f1" "h air preferably' taking place when the pumping piston nea s the lower end of its down stroke.-

" A further object of the invention is to provide an engine of the above mentioned character, which is simple in construction. inexpensive to manufacture. strong. durable. and

convenient in use. til

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which nupumping cylinder upon the upper end of which is formed an explosion cylinder 10,

the explosion cylinder, preferably having a smaller diameter than the pumping cylinder, as shown. Mounted to reciprocate within the explosion cylinder 10 is a prefer ably tubular operating piston 11, upon the lower end of which is formed a laterally extending pumping piston 12, of greater diameter and reciprocating. within the pumping cylinder 9, as shown. The pitinan 8 extends into the piston 11 and is pivotally connected therewith, as shown at 13.

Preferably interposed between the pumping cylinder 9 and the explosion cylinder 10 is a preferably annular compression chamber 14.'for'ming in effect a downward continuation of the explosion cylinder 10,- as shown. It is obvious that the location of this compressionlchamber 14: is such that it will receive heat from the explosion cylinder, whereby the incoming charge will be thoroughly heated before entering the explosion cylinder. Portor ports 15, lead at their outer ends into a valve casing 16, having communication with the chamber 14 through a port 17. The port or ports 15 are also in communication'with the lower end of the cylinder 10. A valve 18 is mounted to turn or rock within the valve casing 16, to cover a selected number of the ports 15. when it is desired to reduce or throttle the charge supplied to the explosion cylinder 10, the ports 15 leading into the lower end thereof, as shown.

The operating piston 11 is provided at its lower end with a longitudinally extending exterior port or pocket 19. adapted. when the operating piston is in its lower position, to be in free communication with the interior of the pumping cylinder 9. The exterior port 19 has its upper end in the form of a transverse or horizontal portion 20, adapted when the operating piston ll moves upwardly suiiiciently. for registration with the port 15. In this manner. upon the upstroke of the operating and pumping pistons. the charge compressed in the pumping cylinder 9 will pass through the exterior port 19; ports 15, valve casing 16, and into the compression chamber 1 and remain therein until the operating piston has again traveled downwardly whereby its upper end uncovers the ports 15. at which time the charge within the compression rhapiher 14 will pass into the explosion cyl' the valve casing and communicating with 40.

unco et the ports, upon the down stroke thereof, a pumping cylinder arranged below the explosion cylinder, a acompression chamber interposed between the explosion cylinder and pumping cylinder, means of communication between the compression chamber and inlet port, a pumping pistoncairied by the working piston and operating. within the pumping cylinder, said work-i ing piston. being provided near and above the pumping piston with a longitudinal'exterior pocket adapted for registration with the inlet port, a valve casing formed upon the pumping cylinder near and below the compressionchamber and having a main 0y lindrical opening. and an auxiliary exhaust port having no communication; with the main cylindrical opening and communicat- V ingwith. the exhaust port of the explosion the valve casing having means of commucylinder, the main cylindrical opening of nication with the pumping cylinder, and a rotatable valve mounted within the valve casing to control the passage of gas through the means of communication between the.

valve casing and pumping cylinder.

QWInan engine of the character described,

an explosion cylinder provided with an iiilct port and a permanently unobstructed exhaust port, a piston mounted to reciprocate f within the explosion cylinder, apparatus to supply gas to the inlet port, a valve casing connected with the apparatus. having communication therewith. and spaced a substan-;

tial distance from the permanently unobhaust port, formed thei-ethrough having no the exhaust port. and a movable valve mounted within the main opening of the the inletport.

In apparatus of the character described, an explosion cylinder provided was an inlet port and 'an' exhaust, port, a working piston mounted to reciprocate withingthe explosion cylinder, a compression chamber having communication Witlrthe nlet port,

a movable valve to control such com'muni- 56-" 4. In an engine of the character described,

ail-explosion cylinder provided with inlet and exhaust'ports, a'working piston mounted to reciprocate w th n thee'x'plosion' cylinder and provided in its lower portion with anvexterior longitudinal pocket adapted to communicate withtlie inlet port, a pump-\ ing cylinder, a pumping piston connectedwith the working piston and operating.

-within the pumping cylinder, an ,annular .70

compression chamber surrounding the lower portion of the explosion cylinder beneath and. in proximity to the inlet and exhaust ports and having means of communication with the inlet port,' and a movable valve '75 for controlling the means of communication between the annular compression chamber and the inlet port to increase and reduce 1 the volume of gas passing to and from the compression chamber through the inlet port.

In testimony whereof I afiix my signature in presence of twowitnesses. CHAR-LES M LEECH.

- \Vitnesses: i

' J. M. MATCHETTE,

CLAREXCB C. MILLER. 

